Family of Lionel Joseph b abt 1928 (& sister Luthia?)

Family of Lionel Joseph b abt 1928 (& sister Luthia?)

1930 census, Barton area near Donaldsonville, young Lionel Joseph (b. abr 1928) and sister Luthia - looks like Luthor (born abt 1921)are living with Rev Moulton Carter and wife, and are listed as their grandchildren. I am looking for them, their family (not sure which was Morton's child). There are some other Josephs around their but none I can't tell which it might be.